[Bug] 并发异步发送消息时，报错 send request failed，导致消息无法发送

[onejimmyboy]

Before Creating the Bug Report

• [X] I found a bug, not just asking a question, which should be created in GitHub Discussions.

• [X] I have searched the GitHub Issues and GitHub Discussions of this repository and believe that this is not a duplicate.

• [X] I have confirmed that this bug belongs to the current repository, not other repositories of RocketMQ.

Runtime platform environment

centos 7

RocketMQ version

rocketmq 5.1.3

JDK Version

openjdk1.8

Describe the Bug

使用官方的异步发送消息例子，将messageCount调成1W时，执行报错，报错信息如下

Steps to Reproduce

broker：5.1.3 client：5.1.3 使用官方的例子，异步发送报错，demo为

What Did You Expect to See?

全部发送成功

What Did You See Instead?

很多消息发送失败

Additional Context

No response

[onejimmyboy]

https://github.com/apache/rocketmq/pull/4601这个mr优化了这块，但是不明显，还是说我使用的有问题

[humkum]

看下日志中发送失败的原因是什么，大概率是触发 broker busy 了

[onejimmyboy]

看下日志中发送失败的原因是什么，大概率是触发 broker busy 了 broker.log中没有错误日志生成， 但是在remote.log中存在错误日志 下图是client的日志

[lvgitt]

为啥没人回复